Lathe turret



Dec. 9, 1952 R. STEHL Filed Sept. 12, 1949 LATHE TURRET 3 Sheets-Sheet 1 Inventor Raymond Seh/ aaa/Wawa, MS

R. STEH L LATHE TURRET 5 Sheets-Sheet 2 Filed Sept. 12, 1949 Raymohd Steh/ ,O By w Dec. 9, 1952 R, STEHL 2,620,548

LATHE TURRET Filed Sept. 12, 1949 3 Sheets-Sheet 3 Fl'g. 4.

Raymond Sfeh/ Patented Dec. 9, 1952 UNITED STATES LATHE TURRET Raymond Stehl, Chicago, Ill.

Application September 12, 1949, Serial No. 115,207

' i 4 olaims. o1.29 `48) This invention relates to novel improvements in lathe turrets and more particularly appertains to an improved indexing mechanism for the tool mounted in the turret head.

The primary object of this invention is to rotate the turret head for selectively positioning tools, secured in the tool sockets formed in the head, in longitudinal alignment and in working position with the arbor or spindle and to lock the turret head so that the selected tool is held in such alignment.

Another important object of this invention is' to enable various tools, carried by the turret head, to be moved into working position and to be held securely in such position, the entire indexing operation requiring but one movement of an operating shaft.

A meritorious feature of this invention resides in the provision of a base section and head section rotatably mounted thereon, the sections forming the turret, the base section being secured on the lathe arbor and. housing the indexing mechanism for aligning the tool sockets formed in the rotatable head with the arbor.

These and ancillary objects and other structural features of merit are attained by this in- Vention, the preferred embodiment of which is set forth in the following description and illustrated in the accompanying drawings, wherein:

Figure l is a side elevational View of a lathe turret, constructed in accordance with this in- Vention, the same being shown and operatively mounted on a lathe arbor or spindle;

Figure 2 is a top plan View thereof Figure 3 is a side elevational View of the turret;

Figure 4 is a longitudinal Vertical sectional view;

Figure 5 is an enlarged fragmentary Vertical sectional View, illustrating the indexing mechanism, which is operatively housed in the base section of the turret;

Figure 6 is a fragmentary detailed sectional View taken on line 6-6 of Figure 5;

Figure '7 is a fragmentary enlarged sectional view of a portion of the upper section of the base and the lower section of the head, illustrating the means provided for preventing sliding movement of the Operating shaft or lever for the indexing mechanism;

Figure 8 is a transverse sectional View, taken on line 8-8 of Figure 4, and,

Figure 9 is a fragmentary transverse sectional view taken on line 9-9 of Figure 4.

Referring now more particularly to the accompanying drawings, the lathe turretill lncludes a substantially round base section. [4, which is formed with an axially disposed passage IB. An integral sleeve or boss |8 extends upwardhr from the top 20 of the base, the bore of the sleeve being in alignment with the passage IB, so that the walls of the passage and the inner walls of the sleeve are continuous. The passage is counter-sunk as at 22 and the outer wall is chamfered as at 24. A bore v26 is formed angularly through the side wall of the base, adjacent the bottom portion thereof, the bore being inclined relative to the axis of the base and being adapted to receive the reduoed end of a lathe arbor or spindle 28. A substantially circular head section 30 is provided and is formed with an outwardly fiared skirtV 32. The head is drilled and bored axially to form a centrally disposed axial passage 34, within which the sleeve l8 of the base is disposed, the head section rotating about the sleeve and being rotatively disposed on the top 20 of the base. The head is counterbored as at 36 to form a diametrically enlarged outer opening at lthe `outer end of the passage 34.

An exteriorly threaded tiebolt 38 is disposed through the passage |6 in the-base and through the sleeve 1%, the head 40 of the bolt being seated within the counterbore 36. It is to be noted that the head 40 of the bolt is formed with Vertical openings liZ, which are provided so that the head may be gripped by a tool and held'against rotation, when the nut'M is secured on the opposing end of the bolt, the nut being received within the counterbore 22 in the base.

An opening 46 is centrally disposed longitudinally in the head end of the tie bolt and a spring '38 is disposed in the opening to resiliently mount a stud 56, which is formed with a flat head 52. In this respect, an annular groove 54 is formed around the counterbore 36 to receive an oil cap or cover plate 55, the latter being formed with a center Vertical opening 58. It is to be noted that the upper face of the head 52 of the stud is in alignment with the center opening 58 of the plate and closes off the opening. Thus, chips and dirt are prevented from entering the passage in the head and are prevented from entering the counterbore to interfere with the free rotation of the head on the base. For oiling purposes, however, the center opening in the plate and the resiliently urged stud closing off the opening, are provided. Thus, oil may be introduced into the counterbore passage in the head and into the annular space 59, formed between the head and base concentric with the sleeve 8.

A plurality of circumferentially spaced tool the. shank of the shaft.

jintheiside wall of the looking pin S6.

socket.

sockets 60 are formed through the skirt 32 of the head, the tool sockets being inclined upwardly and outwardly from the axial passage in the head. Internally threaded bores 52 are formed through the lower portion or underside of the skirt 32 and are transversely communicated With the sockets 60, set screws 54 being threadingly disposed in the threaded bores 62 for looking the shanks of the tools within the tool sockets.

It can be seen that the turret head is rotatively mounted on the base and that the base is adapted to be secured to the lathe arbor. A plurality of various tools can be carried by the turret head and it is the primary purpose and aim of this invention to selectively align the tools with the arbor shank, as illustrated in Figure 4, wherein one of the tool sockets 60 is ;illustrated in longitudinal alignment with the arbor 28. .aligned with the arbor shank by merely rotating the head on the base. However, an indexing The tool sockets may be axially the .opening 12, whichis alignedtwith the socket retaining the desired tool. Of course, by holding the lever 90 down, .the looking pin 65 is held in a lowered position and the head may be ro- V.tatedto cause the sockets to pass over the pin,

without the pin being urged into the socket. It .can thus be seen that a novelly and simply constructed turret head is provided, the turret head being rotatively mounted on a base, within and jlooking meohanism must be provided and seated. The spring 10 functions to bias orV urge .the looking pin upwardly in the base section relative to Vertical openings 12 formed in the bottom of the head. The openings 72 are ciroumferentia'lly spaced and are formed in verjtical alignment with the sockets, the openings 1.2' being parallel with the axial passage 34 formed in the head. Means is provided for moving the pin 68 out of engagement in the openfings 12. and includes a shaft 'M which is transversely disposed in the base and laterally extends through the side wall thereof, the shaft being rotatably journaled in a transverse opening 16 formed in the base at right angles to the axial passage v|6. An annular groove 'E3 is formed ,on the shaft, adjacent to the inner end and a pin 80`is 'receivedin the groove 'E8 to bear against The pin is mounted ,in an opening B2 formed through the top of the base and is provided with a top section 84, a spring 85 beingrinterposed between the top seo- -tion and the pin proper and funotioning to retain the pin seated within the groove.

The pin 8B prevents the shaft from sliding vtransversely in the base but, of course, does not interferewith the rotary movement of 'the shaft. ;Adiacent vto the center of the shaft, a flat cutout portion 86 is formed, the same being complementary to and engageable `with a reotangular opening 88, which is formed longtudinally It is to 'be ,noted that the pin E6 cannot rotate, inasmuch as the pin is held within the cut-cut portion 86 of the shaft 14. However, rotation imparted to the'shaft 'M is translated into vertically sliding movement of the pin 66 by means of the oomplementary interengaging cut-out portions or slots formed in the shaft and pin respeotively. For rotating the shaft T5, a lever 'or handle- 90 is fixed in the outer end of the shaft and projects laterally therefrom.

It can thus be seen that the desired toolv in 'the tool socket is looked, by means of the looking pin 6'6 `being received within the opening 12, which is vertically aligned with the looked tool However, to. bring the nextftool into which is operatively disposed an indexing or looking mechanism for selectively looking the head in various positions in order to bring one of the tool sooketsformed in the head into longitudinal alignment with the bore 26 in the Vbase and the arbor shank 28 seoured Vwithin the bore.

Of course, inasmuoh Aas the foregoing lrepresents ,but Vone embodiment of 'this invention, it is Vto be understood that various changes may be resorted to, lthe same coming within the pur- View of the appended olaims.

i Having thus desoribed this invention, what I desire to claim is:

1. A lathe turret comprising a base section and a head section rotatably mounted on the base section, means for preventing ax-ial separation 'of `the base and head seotions, said base section lhaving 'a bore therein angularly inclined to the axis of rotation of the head section, said head section having spaced angularly disposed Vtool sockets lselectively rotatable into alignment with the bore in the base section, looking means for releasably preventing rotation of the head section and for seleotively retaining one of the sookets inV alignment with the bore, actuating lmeans for the looking means including a shaft journaled for rotation in the base section and extending laterally therefrom, and releasable means carried by the base section and held in operative engagement' with the shaft by engagement with the oontiguous face of the head sectionV for preventing longitudinal movement of the shaft. i

2. Ala-the turret .oomprising a base section and a head section rotatably mounted on the'ba'se section, means for preventing axial separation of the base and head seotions, said base section having a bore therein angularly inolined to the axis of rotation of the head section, said head seotion having spaced angularly disposed tool sockets selectively rotatable into alignment with the bore in the base section, 'looking means for releasab-ly preventing rotation of the head section and for selectively retaining one of the sockets in alignment with the bore, actuating means for the looking means including a shaft journaled for rotation in the base section and extending laterally therefrom, and releasable means carried by 'the base section and biased between the contiguous face of the head section and the shaft for preventing longitudinal movement of the shaft;

3, A lathe turret comprising a base section and a head section rotatably mounted on the base `seoticn, means forpreventing axial separation of the base and head seotions, said 'base section having a bore therein 'angularly inclined' to the axisof rotation of the headsection, said head section having spacedangularly disposed tool sookets selectively rotatabl'e into alignment with lthe bore in the base section, looking means for releasably preventing rotation of the head section and for selectively retaining one of the sockets in -alignment with the bore, actuating means for the locking means including a shaft journaled for rotation in the base section and extending laterally therefrom, and releasable means carried by the base section and. biased between the oontiguous face of the head section and the shaft for preventing iongitudinal movement of the shaft, said last means comprising the shaft having a peripheral groove, said base section having a passage therein opening through the face thereof adjacent the head section, a pin slidable in the p'assage toward and away from the shaft, and resilient means seated against the contiguous face of the head section urgng the pin into the groove in the shaft.

4. A l-athe turret comprising a base section and a head section rotatably mounted on the base section, said head section having an 'axial passage therethrough, said base section having an axially extending boss rotatably received in the passage, the end of the passage remote from the base section being countersunk, a headed fastener dis- 'posed in the passage and releasably engaging the base section with the head thereof seated in the countersunk portion of the passage, a cover plate carried by the head section closing off the end of the passage remote from the base section, said cover plate having a central opening for ntroduction of a lubricant, and spring biased means carried by the fastener normally closing said opening, said base section having a bore therein angularly inclined to the axis of rotation of the head section, said head section having .spaced anguiarly disposed tool sockets selectively rotatable into alignment With the bore in the base section, looking means for releasably preventing rotation of the head section and for selectively retaining one of the sockets in alignment With the bore, actuating means for the looking means including a shaft journaled for rotation in the base section and extending laterally therefrom, and releasable means carried by the base section and held in operative engagement With the shaft by engagement with the contiguous face of the head section for preventing longitudinal movement of the shaft.

RAYMOND STEHL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 10,712 Trott Mar. 28, 1854 166,787 Krutzsch Aug. 17, 1875 666,263 Cox Jan. 22, 1901 784,984 Carson Mar. 14, 1905 851,354 Hockensmith Apr. 23, 1907 1,227,486 Newman et al May 22, 1917 1,737,002 De Vlieg Nov. 26, 1929 FOREIGN PATENTS Number Country Date 81,161 Switzerland May 15, 1919 

